Schmuckpass

English translation: grading report/certificate

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This has come up in a list of features describing jewellery. It is a type of certification, but does not seem to be as official as a Certificate of Authenticity. Is there an equivalent for this in English?

GRADING REPORT
Sometimes called a 'certificate', although labs do not 'certify' diamonds. The grading report, issued by an independent laboratory, should accurately describe the proportions, weight, color, clarity, symmetry, polish and possible fluorescence seen in the diamond being evaluated. Some labs such as GIA and AGS are felt by many experts to be more consistent and stringent in their grading than some other labs. http://www.pricescope.com/glossary/3#term36

GRADING REPORT
Sometimes called a 'certificate', although labs do not 'certify' diamonds. The grading report, issued by an independent laboratory, should accurately describe the proportions, weight, color, clarity, symmetry, polish and possible fluorescence seen in the diamond being evaluated. Some labs such as GIA and AGS are felt by many experts to be more consistent and stringent in their grading than some other labs. http://www.pricescope.com/glossary/3#term36

The image certainly looks like a passport or identity card and the term appears to refer to something more like a logbook, registration document or identification document than a formal certificate of authenticity, issued by the seller rather than by any official certifying body.